Republican presidential candidate Ted Cruz, left, is welcomed to the stage by Donald Trump at the Palm Beach County Republican Party Lincoln Day dinner at the Trump-owned Mar-a-Lago Club in Palm Beach on Feb. 20, 2013. Trump wasn't yet a presidential candidate.

Republican presidential candidate Ted Cruz, left, is welcomed to the stage by Donald Trump at the Palm Beach County Republican Party Lincoln Day dinner at the Trump-owned Mar-a-Lago Club in Palm Beach on Feb. 20, 2013. Trump wasn't yet a presidential candidate.

Democratic National Chairwoman Debbie Wasserman Schultz is supporting Republican presidential candidate Ted Cruz on the question of whether he's a citizen legally qualified to serve as president of the United States.

Cruz was born in Canada, prompting Republican presidential candidate Donald Trump to raise questions about whether Cruz's birthplace makes him ineligible to serve.

Cruz and Trump are locked in pitched battle for the top two spots in Iowa and New Hampshire, the first two states in the presidential nominating contests that begin next month. Trump also pushed the theory that President Barack Obama wasn't born in the U.S., even though there wasn't any evidence to support the claim.

Cruz's conservative positions on social issues and the role of government, issues such as health care, and bellicose rhetoric on foreign affairs make him anathema to Wasserman Schultz, who is a Democratic congresswoman from Weston in addition to her role as Democratic party chairwoman.

But, she said in response to a reporter's question Monday at an unrelated event in Weston, she has no doubt that Cruz is legally eligible to serve.

"No, I have no doubt. Senator Cruz is a natural born citizen by virtue of the 14th Amendment to the United States Constitution," Wasserman Schultz said.

Another prominent Florida Democrat, U.S. Rep. Alan Grayson of Orlando, said he isn't sure about Cruz's eligibility.

"It's a legitimate issue. The Constitution says 'natural born citizen,'" Grayson said last week in an interview with The Hill. "Whether Ted Cruz falls on that side of the line or the other side of the line is a matter for the courts to determine."

Grayson said he would file a lawsuit over the matter "if and when he becomes the nominee and tries to qualify for the ballot."

(Anthony Man)

Grayson is seeking the Democratic nomination to run for U.S. Senate this year.

Cruz's campaign has been forced to spend time responding to the issue since Trump began raising it. On the CNN Sunday show "State of the Union," the candidate said he has no doubt about his eligibility.

"And my mother -- look, the Internet has all sorts of fevered swamp theories, but the facts are simple. My mom was born in Wilmington, Delaware. She was an American citizens by birth. She's been an American citizens all 81 years of her life. She's never been a citizen of any other place. And so the law is simple and straightforward. And it's actually come up a bunch of times in our nation's history. So, John McCain was born in Panama, but he was a U.S. citizen because his parents were citizens," Cruz said on CNN. "As a legal matter, this question is straightforward."